PHYSICS
A quantity is represented by xM L Ta b c. The
percentage error in measurement of M, L and T are
%, % %and respectively. The percentage
error in x would be
(a) a b c %
(b) a b c 100%
(c) a b c %
(d) None of these
The velocity of a body as a function of time is
v=10-5t. Find the average velocity of the body in
the time interval from 0s to 2s.
(a) 0 (b) 5 m/s (c) 10 m/s (d) 20 m/s
A swimmer crosses a flowing stream of width
A motor car is travelling at 30
to
and fro time t 1. The time taken to cover the same
distance up and down the stream is t 2. If t 3 is the
time the swimmer would take to swim a distance
2 in still water, then
(a) t1 2 3^2 t t (b) t2 1 3^2 t t (c) t3 1 2^2 t t (d) t3 1 2 t t
m/secon a circular
road of radius 500 m. It is increasing its speed at
the rate of 2.0ms^2. The total acceleration is:
(a) 1.8ms^2 (b) 2 ms^2 (c) 3.8ms^2 (d) 2.7ms^2
Two bodies of massess M and 4M are placed at a
distance r. The gravitational potential at a point on
the line joining, where the gravitional field is zero,
is
(a) Zero (b)
4 GM
r
(b)
6 GM
r
(d)
9 GM
r
The self gravitational potential energy of a spherical
shell of mass M and radius R is
(a)
2
2
GM
R
(b)
GM^2
R
(c)
2
4
GM
R
(d)
3 2
5
GM
R
Which of the following statement is correct
regarding a geostationary satellite?
(a) A geostationarysatellite goes around the earth
in east-west direction.
(b) A geostationary satellite goes around the earth
in west-east direction.
(c) The time period of a geostationary satellite is 48
hours.
(d) The angle between the equatorial plane and the
orbital plane of geostationary satellite is 90 .
A cubical block of side L rests on a rough horizontal
surface with coefficient of friction
6.
7.
8.
. A horizontal
force F is applied on the block as shown in the
figure. If the coefficient of friction is sufficiently
high so that the block does not slide before
toppling, the minimum force required to topple the
block is
